Hi, here is a small tutorial on how to make Vagrant snapshots (Vagrant backups). Snapshot is a saved state of a system in a certain time point that allows you to return to that state in case you need it. This lets you experiment and try things and quickly...

Comet and Pub/Sub and their implementations in the Rails ActionCable framework.
Comet
Comet is a technology (a web application model) that allows sending data to he client without any requests from the client side. The server decides when and what data it wants to transfer to the client. Alternative name of...

Untitled Document.md
Why DBeaver
Recently I was looking for a simple free database viewer for PostgreSQL on Ubutu 16.04. I failed to catch up on PgAdmin3, but came across a topic on HN where various GUI tools for PostgreSQL were discussed:
Postage – A fast replacement for pgAdmin
These 2 options looked...

Target HTML Elements with Selectors
To add JS to your HTML, you need a script tag. Your browser will run any JS inside a script element, including jQuery.
Code that you put inside the document ready function will run as soon as your browser has loaded your page:
$(document).ready(function() {
...